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On the theory of the shear-induced isotropic-to-nematic phase transition of side chain liquid-crystalline polymers |
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| Authors: | Siegfried Hess Patrick Ilg |
| Institution: | (1) Institut für Theoretische Physik, Technische Universität Berlin, PN 7-1, Hardenbergstr. 36, 10623 Berlin, Germany |
| Abstract: | The shear-induced isotropic-to-nematic phase transition of side chain liquid-crystalline polymers is studied theoretically. A modification of the previous models of main-chain liquid crystals to the case of side chain liquid-crystalline polymers is proposed. Orientational and rheological properties of the model are studied in plane-shear flow. Predictions of the present model agree qualitatively with experimental results (Pujolle-Robic, Noirez in Nature 409:167, 2001). |
| Keywords: | Side-chain liquid crystal polymers Shear flow Isotropic to nematic transition Normal stress difference PACS numbers: 36 20 Ey - Conformation (statics and dynamics) 64 70 Md - Transitions in liquid crystals 83 50 Ax - Steady shear flows viscometric flows |
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